Wrench



Oct. 16, I923. 1,471,142 I v A. A. CRESS 1 WRENCH Filed Feb. "1'. 1922 al rozuzg,

ToaZ Z whom it may concern; I

Patented Get 15, 1923.

i ALVA nonnss, Gammo MICHIGAN,

WRENCH.

Application filed February}; 1922. Serial K045133345.

Be it known that ALmi-i. Cnnss, afciti'zen '01 the United States of America, residing at Detroit, in the county of Wayne; and

State of Michigan, has invented new and" useful Improvements in Wrenches, of which the ii'ollowing is a specification. p

The objectof the invention is to provide a wrench having an adjustable jaw' with means for readily and eiiiciently loo-lung the V movable jaw in'its adjusted positions to pre vent variation in the position thereof elther toward or from the object interposed hetween the jaws andthereby minimize the tendency of the wrench to slip around the ankles of nut and bolt heads particularly when the latter are of relatively soft material; and with this object in View the inven- 7 tion consists in a'construction and combination of parts of which a preferred embodi-, ment is shown lnthe accompanying draw ings, wherein V V Figure l isa sideview of a'wrench embodying the invention. 7 V

Figure 2 is a detail sectional View of a portion of the same. I j

The wrench embodies essentially a shank 10 having a fixed outer head 11 and a'movable head 12- provided witha slide 13 fitted towardand from the fixed j aw, said movable jaw being adjustable by means of a knurled screwletrevolubly mounted. upon a'hxed spindle 15 carried by the movable jaw and engaging a rack 16 on'the shank.

The adjusting screw is exposed for access to the fingers oi the operator in a'cutaway portion 17 ot' the movable jaw between justing screw and the spindle 15 is threaded as indicated at 20 for engagement with an opening 21 in the inner end of the jaw and also for engagement by a lock nut 22 which is adapted for ad ustment into frictional engagement with the inner end of theadjusting screw 1 Therefore after an adjust- I ment of'the movable jaw to the proper .in-

7 the adjusting screw by a continuationof the terval from the fixed jaw 'to engage an interposed "jaw, the lock nut, which is of slightly less diameter than the adjusting screwihut is located at the inner end thereof maybe turned up against theinner end of movementor' the fingers whichserves toad just'sald screw, to lock the latter and there fore the morable jaw in its fiClfllStGC-YPOSl tion, V

The coaxialand ad ust ng relation of the adjusting screw and locking nut in other words, provides for an ad ustment of the aw and a locking of the latter in the ad-' grasping theshanlr, so that while there is no loss of time involvedin the adjustment oi the wrench to. the object to be grasped, the jaw is secured against displacement during thecontinuance of the work which necessitates that particular adjustment.

The lock nut 2-2 when in engagement with the adjacent screw 1 may heimoved'into abutting relation with the shoulder :19 and thus lockthe spindle in place to preclude its WOI'lHIIgOHt due to the handling "of thewrench and the rotation of the threaded portlon 1n the internally threaded opening 21. hen the lock nut isengaged withthe adjusting screw, the latter is forced against the shoulder 18 and since the lock nut is usted position practically hya'single move ment of the thumb and toreiinger or a hand engaged with the threaded portion oi? the spindle the latter is precluded from any; change of pos1t1on due to angular mov V for adjustment upon the shank and movable ement due to the engagement of the screw 14; ot theshoulder18and the lock nut with the screw-14'. I

Having described the invention clalmed as new and useful is:, 4

spaced-shoulders betweenwhich is exposed a rack "formed on the shanln a spindle span- 1 ningcsaid shouldersjand having a threaded portion engaging an interiorly threadedhole communicating with one shoulder. an ad justing screw slidably mounted on the spin what is die and engaged with theraclron the shank.

snd a lock nut carried by the threaded portie spindle and movable into ahutQ ting engagement with the adjacentlshoulder or into; abutting engagement with one;

tion of end of the adjusting screwto force the :lat-

ter into'contactlwith the remaining shoulder I in the manner and for the purposespecified;

In testimony whereof nature I j l 7 i 'AL VA a. cnnssi he afiixes his sig- 

